package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.BaseException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        // 1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        // 2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            // 账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        // 密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        String md5DigestAsHex = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!md5DigestAsHex.equals(employee.getPassword())) {
            // 密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            // 账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        // 3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param dto 前端传入的参数
     */
    @Override
    public void add(EmployeeDTO dto) {
        // 先确认该用户名是否存在
        Employee byUsername = employeeMapper.getByUsername(dto.getUsername());
        if (!(byUsername == null)) {
            throw new BaseException(MessageConstant.ACCOUNT_FOUND);
        }
        // 1、将dto复制到实体对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(dto, employee);
        // 补齐基础信息
        //设置员工启用禁用状态
        employee.setStatus(StatusConstant.DISABLE);
        //通过MD5对密码进行加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employeeMapper.add(employee);
    }

    /**
     * 修改员工信息
     *
     * @param dto
     */
    @Override
    public void update(EmployeeDTO dto) {
        // 拷贝对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(dto, employee);
        employeeMapper.update(employee);


    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO dto) {
        // 分页参数健壮性判断
        dto.check();
        // 告知PageHelper页码和单页记录数
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        // 调用mapper查询
        Page<Employee> page = employeeMapper.pageQuery(dto);
        // 封装并返回结果
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public Employee queryById(Integer id) {
        return employeeMapper.queryById(id);
    }

    /**
     * 修改员工状态
     */
    @Override
    public void switchStatus(Integer status,Long id) {
        //封装数据
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        employeeMapper.switchStatus(employee);
    }


}
